Indiana Code Title 22. Labor and Safety § 22-10-2-5

Sec. 5. Whenever any mine or mines, the shaft or opening of which is located in any state other than the state of Indiana, shall have entries or working   1 underground extending into and within the state of Indiana, a compliance with the laws of the state in which the shaft or opening of said mine is located governing mines and mining, shall be taken, deemed and considered in full compliance with the laws of the state of Indiana governing mines and mining as to all that part of said entries and workings lying and being within the state of Indiana.